The variance-ratio (VR) test statistic, which is based on k-period differences of the data, is commonly used in empirical finance and economics to test the random walk hypothesis. We obtain the ...

This is a preview. Log in through your library . Abstract A class of invariant hypothesis tests is considered for the purpose of testing a variance ratio arising in mixed models. Members of the class ...

In most GWAS, the participants are assumed to be unrelated and to come from a single population. However, even in carefully designed studies, some degrees of relatedness and population stratification ...